[lwip-users] IPv6 source address selection for loopback destination

[James Ko]

I have an application that adds a tunnel interface with a link local address, 
fe80::2.
On the same device another thread creates a listen socket using the ipv6 
loopback address ::1.  This is the first part of a socket pair.  When trying to 
connect to the loopback address I'm finding the source address selection is the 
link local address of the tunnel interface rather than the loopback interface.  
The connect fails since the tunnel forwards all packets to the other end.

Is there something that needs to be done in the tunnel interface or connect 
procedure that will enable correct source selection or loopback connections 
when the tunnel is up?
Is this a bug in the source selection?  

I have tried with LWIP_HAVE_LOOPIF alone and with LWIP_NETIF_LOOPBACK 
configured.

Thanks,
James